If you are using an iPhone and have been salivating over the Windows 8 UI, you now have the opportunity to experience the Metro-goodness if your device is jailbroken as you can now download a Windows 8 UI for the iPhone.
The skin is remarkably robust and features the tiles we know and love, charms and even "desktop" support. Desktop support is actually a shortcut back to the standard iOS interface but switching between "Windows 8" and iOS is a fluid experience.
The UI runs on-top of dreamboard and the actual theme will set you back a $1.50; but that"s a small bit of change if you are bored of the standard iOS experience.
Source: Jailbreaknation | Thanks for the tip @danielbru